Title: Introducing Windows® 8: An Overview for IT Professionals (Introducing (Microsoft))
Author: Jerry Honeycutt (Microsoft Press)
Price: FREE
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Get a head start evaluating Window 8. Based on the Release Preview of the software, this guide introduces new features and capabilities, with scenario-based insights demonstrating how to plan for, deploy, and maintain Windows 8 in an enterprise environment.

Network administrators will get an early, high-level view of these topics and more:
Performance, reliability, and security features
Deployment options
Managing the new UI using Group Policy and Windows PowerShell